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DEFORMATION AND MICROFRACTURE OF GRANULAR BAINITE |
CHEN Huangpu Xi'an Jiaotong University;Correspondent The Research Institute for Strength of Metals;Xi`an jiaotong University;Xi`an 710049 |
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Cite this article:
CHEN Huangpu Xi'an Jiaotong University;Correspondent The Research Institute for Strength of Metals;Xi`an jiaotong University;Xi`an 710049. DEFORMATION AND MICROFRACTURE OF GRANULAR BAINITE. Acta Metall Sin, 1992, 28(5): 40-43.
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Abstract Relationship among deformation history, fracture process and stress distribu-tion of granular bainite has been investigated. The main process of fracture of granularbainite is forming, growing and coalescence of the microvoids. Even though the microcrackshave formed at the earlier stage of deformation, they are not fateful for fracture because in thesuccessive deformation stage the microcracks change their orientation and parallel to the ten-sile axis. The strain hardening rate of granular bainite has a minimal value during thedeformation process. Before and after the strain of the minimal value, the material showsdifferent stress distribution and microfracture mechanism.
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Received: 18 May 1992
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1 陈黄浦,金达曾,邓增杰,周家祥,叶秀英.西安交通大学学报,1984;18(6) ;45 2 Bridgman P W. Studies in Large Plastic Flow and Fracture. New York: McGraw-Hill, 1952: 9 3 McClintock F A. Trans ASME, Ser. E: J Appl Mech, 1968; 35: 363 4 Beachem C D. ASM Trans Q, 1963; 56: 318 5 Rice J R, Tracey D M. J Mech Phys Solids, 1969; 17: 201 6 Bates R C. In: Wells J. M, Landes J D eds., Fracture: Interactions of Microstructure, Mechanisms and Mechanics, New York: AIME, 1984: 17 7 陈黄浦.西安交通大学硕士学位论文,1988 8 Ashby M F. Philos Mag, 1966; 14: 1157 |
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